Home / 15,445.07-21,311.97-8,639.06

Finding the Fourth Proportional to 15,445.07, 21,311.97 and 8,639.06

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Solution

The fourth proportional to 15,445.07, 21,311.97 and 8,639.06 is: 11,920.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.07 : 21,311.97 = 8,639.06 : x
  2. Step 2: Convert to fraction form
    15,445.07/21,311.97 = 8,639.06/x
  3. Step 3: Cross multiply
    15,445.07x = 21,311.97 × 8,639.06
  4. Step 4: Simplify right side
    15,445.07x = 184,115,312.67
  5. Step 5: Solve for x
    x = 184,115,312.67/15,445.07
  6. Step 6: Final answer
    x = 11,920.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.